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The 2v Alternate Geodesic Dome is popular because it is strong, and is a hemisphere, so its height in the center is equal to its radius.
There are 2 ways to lay out the dome. The upper illustration shows single struts. The lower illustration shows the layout with split b struts, so they can be screwed together on the sides. These can be made of 1x4s and make a 2x4 when screwed together.
It can be formed as triangles using Natural Fiber Reinforced Concrete, one triangle at a time, or a 1 x 4 frame for a dome of about 30 feet wide, can be covered with chickenwire, and palm leaf strips dipped in moist Portland Cement.
One can also use Paper Machť if itís painted with waterproof paint on the outside.
Naturally, these are all above ground uses. For below ground construction see a qualified structural engineer for your earthquake zone.
This type of construction would be valuable in an area devastated by an earthquake or hurricane, because it is strong, durable, can often be made from items left over after the disaster. They are quick, and can be built on site without a foundation.
While cleanup work is underway, a hole can be cut in the top to let smoke out, and a comfortable campfire built in the middle on the ground.
If built over about 15 feet high, a second floor may be added without needing support from the outer walls.
Itís a convenient shell structure.
Thanks for your interest.
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